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Recent Advances in Optical Engineering of Light-Emitting Electrochemical Cells

机译:发光电化学电池光学工程的最新进展

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Since the first demonstration of light-emitting electrochemical cells (LECs) in 1995, much effort has been made to develop this technology for display and lighting. A common LEC generally contains a single emissive layer blended with a salt, which provides mobile ions under a bias. Ions accumulated at electrodes facilitate electrochemical doping such that operation voltage is low even when employing high-work-function inert electrodes. The superior properties of simple device architecture, low-voltage operation, and compatibility with inert metal electrode render LECs suitable for cost-effective light-emitting sources. In addition to enormous progress in developing novel emissive materials for LECs, optical engineering has been shown to improve device performance of LECs in an alternative way. Light outcoupling enhancement technologies recycle the trapped light and increase the light output from LECs. Techniques to estimate emission zone position provide a powerful tool to study carrier balance of LECs and to optimize device performance. Spectral tailoring of the output emission from LECs based on microcavity effect and localized surface plasmon resonance of metal nanoparticles improves the intrinsic emission properties of emissive materials by optical means. These reported optical techniques are overviewed in this review.
机译:自1995年首次演示发光电化学电池(LECS)以来,已经努力开发了这种技术的显示和照明。常见的LEC通常含有与盐混合的单个发光层,其在偏压下提供移动离子。在电极上累积的离子促进电化学掺杂,使得即使在采用高功函数惰性电极时,运行电压也很低。简单装置架构,低压操作和与惰性金属电极的兼容性的优异特性呈现适用于经济高效的发光源的LEC。除了开发LECS新颖的发光材料方面的巨大进展外,还显示了光学工程,以改善LECS的设备性能。光外耦合增强技术回收捕获的光并增加LEC的光输出。估计发射区位置的技术提供了一种有力的工具来研究LEC的载波平衡并优化设备性能。基于微腔效应和局部表面等离子体的金属纳米颗粒的局部化型等离子体谐振来剪裁来自金属纳米颗粒的局部等离子体谐振的谱剪裁改善了光学手段的发光材料的本质排放性能。本次审查中概述了这些报告的光学技术。

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